diff options
author | shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-01-12 08:38:09 +0000 |
---|---|---|
committer | shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-01-12 08:38:09 +0000 |
commit | f6ea376317ad94a6cde01a47d0e94d709b5ab43d (patch) | |
tree | b2d2a927d72af30b1d6bc9adada8f7ab7101f758 /tool/ruby_vm/helpers/scanner.rb | |
parent | 9456f88f00292d202ba9910b26fdb1cd0a499d93 (diff) | |
download | ruby-f6ea376317ad94a6cde01a47d0e94d709b5ab43d.tar.gz |
delete tool/instruction.rb (2nd try)
Previous commit changed insns.def format. Now is the time for its
generators. In doing so I chose to modernize the system, not just
patch. My attempt includes
- extensive use of Onigumo regular expressions
- split from one big file (instruction.rb) into separated MVC
- partial view
Also, let me take this opportunity to kill old unused features
such as
- stack caching
- minsns / yasmdata which are never seriously used
- yarvarch document generation (moved to doc/)
- vast majority of unused arguments to insns2vm.rb
This commit generates VM source codes that cleanly compile, and
the generated binary passes tests. At least for me.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61784 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'tool/ruby_vm/helpers/scanner.rb')
-rw-r--r-- | tool/ruby_vm/helpers/scanner.rb | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/tool/ruby_vm/helpers/scanner.rb b/tool/ruby_vm/helpers/scanner.rb new file mode 100644 index 0000000000..3dce6ffdfe --- /dev/null +++ b/tool/ruby_vm/helpers/scanner.rb @@ -0,0 +1,49 @@ +#! /your/favourite/path/to/ruby +# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*- +# -*- frozen_string_literal: true; -*- +# -*- warn_indent: true; -*- +# +# Copyright (c) 2017 Urabe, Shyouhei. All rights reserved. +# +# This file is a part of the programming language Ruby. Permission is hereby +# granted, to either redistribute and/or modify this file, provided that the +# conditions mentioned in the file COPYING are met. Consult the file for +# details. + +require 'pathname' +require 'strscan' + +class RubyVM::Scanner + attr_reader :__FILE__ + attr_reader :__LINE__ + + def initialize path + src = Pathname.new __dir__ + src += path + @__LINE__ = 1 + @__FILE__ = src.realpath.to_path + str = src.read mode: 'rt:utf-8:utf-8' + @scanner = StringScanner.new str + end + + def eos? + @scanner.eos? + end + + def scan re + ret = @__LINE__ + match = @scanner.scan re + return unless match + @__LINE__ += match.count "\n" + return ret + end + + def scan! re + scan re or raise sprintf "parse error at %s:%d near:\n %s...", \ + @__FILE__, @__LINE__, @scanner.peek(32) + end + + def [] key + return @scanner[key] + end +end |